Simple Addition of Two integers in C#

INPUT


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace baba
{
    class Program
    {
        static void Main(string[] args)
        {
            string firstNumber, secondNumber;
            int number1, number2, sum;
            Console.Write("Please enter the first integer: ");
            firstNumber = Console.ReadLine();
            Console.Write("\nPlease enter the second integer: ");
            secondNumber = Console.ReadLine();
            number1 = Int32.Parse(firstNumber);
            number2 = Int32.Parse(secondNumber);
            sum = number1 + number2;
            Console.WriteLine("\nThe sum is {0}.", sum);
            Console.ReadLine();
        }
    }
}


Output

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